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  Air À¯·® º¸Á¤½Ã, »ó´ë½Àµµ °ü·Ã ¹®ÀÇ
  ±Û¾´ÀÌ : thermo   °íÀ¯ID : thermo9798     ³¯Â¥ : 21-08-02 09:59     Á¶È¸ : 4885    
¾È³çÇϼ¼¿ä. Çкλý¶§ ÇØ´ç °Ô½ÃÆÇÀ» ÅëÇØ °øºÎ¸¦ Âü ¸¹ÀÌ Çß¾ú´Âµ¥,
Á÷ÀåÀÎÀÌ µÈ ÀÌÈÄ ¾ÆÁÖ ¿À·£¸¸¿¡ µé¾î¿Íº¾´Ï´Ù. ¿À·£¸¸¿¡ °øºÎÇÏ·Á´Ï ÀÌÇØ°¡ Àß ¾È°¡´Â °ÍÀÌ ¸¹³×¿ä.
Áú¹®Àº Å©°Ô µÎ°¡Áö ÀÔ´Ï´Ù.
Q1) Air Áú·®À¯·®¿¡ ¿Â¾Ð º¸Á¤À» ÇÑ µÚ, ÃÖÁ¾ 3¹ø°ú °°ÀÌ ½Àµµ °ü·Ã º¸Á¤À» ÇÕ´Ï´Ù.
ÇϱâÀÇ 1,2¹ø ÀýÂ÷°¡ ÀÌÇØ°¡ Àß ¾È°¡´Âµ¥, ¼³¸íÇØÁֽøé Á¤¸» °¨»çÇÏ°Ú½À´Ï´Ù.
1. A = (¹° Æ÷È­Áõ±â¾Ð)/(´ë±â¾Ð - ¹° Æ÷È­Áõ±â¾Ð) * (¹° ºÐÀÚ·®/°ø±â ºÐÀÚ·®) * »ó´ë½Àµµ
       = (¹° Æ÷È­Áõ±â¾Ð)/(´ë±â¾Ð - ¹° Æ÷È­Áõ±â¾Ð) * (¹° ºÐÀÚ·®/°ø±â ºÐÀÚ·®) * (¹° ÇöÀç Áõ±â¾Ð/¹° Æ÷È­Áõ±â¾Ð)
2. 1-A (Range 1~0.95)
3. Air Áú·® À¯·® (kg/h) * (1-A)

Q2) P (psia) = exp {14.5017-[7005.5/((1.8*T+414)]}
À§¸¦ ¹°ÀÇ Áõ±â¾ÐÀ¸·Î ÃßÁ¤ÇÏ°í ÀÖÀ¸³ª, Nist¸¦ ÅëÇØ È®ÀÎÇÑ »ó¼ö·Î ´ÜÀ§È¯»êÀ» ÇÏ¿©µµ À§ÀÇ °ªÀÌ ¾È³ª¿É´Ï´Ù.
¾î¶² Áõ±â¾ÐÀÎÁö È®ÀÎÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀÌ ¾øÀ»±î¿ä...?
[¹° ¾ÈÅäÀÎ »ó¼ö, Nist]
logP (bar) = A - (B/(T(K)+C))
A = 3.55959, B=643.748, C=-198.043 (379~573K)
A = 5.40221, B=1838.675, C=-31.737 (273~303K)
A = 5.0768, B=1659.793, C=-45.854 (334~363K)

½ºÅ×Æijë Stefano   21-08-07 01:36
A1)  °ø±âÁß ¼öºÐ°ú °ÇÁ¶°ø±âÀÇ ¾çÀ»  ´ë±â¾Ð°ú Æ÷È­¼öÁõ±â¾Ð ¹× »ó´ë½Àµµ·ÎºÎÅÍ ÃßÁ¤ÇÏ´Â ¹æ¹ýÀ» ¼³¸íÇÏ·Á°í Çѵí Çѵ¥
À¯µµ°úÁ¤ ¼³¸íÀÌ ºñ¾àÀÌ µÇ¾î Àִµí ÇÕ´Ï´Ù . 

P=´ë±â¾Ð,  Pm=¼öÁõ±â ºÐ¾Ð,  Ps=Æ÷È­¼öÁõ±â¾Ð, Pa=°ÇÁ¶°ø±â ºÐ¾Ð, H=»ó´ë½Àµµ(% ´ë½Å ¼Ò¼ö´ÜÀ§),
Mw=¹°ºÐÀÚ·®, Ma=°ø±âºÐÀÚ·® À̶ó°í Çϸé

P = Pm + Pa ......(1)    Pm = Ps*H  .....(2)    <----´ë±â¾Ð,  ¼öÁõ±â ºÐ¾Ð 
P/Pa = Pm/Pa + 1  ..............................(3)    <--- °ÇÁ¶°ø±â ¸ô´ç ½À°ø±â ¸ô¼ö
P/Pa -1 = Pm/Pa  .................................(4)  <----°ÇÁ¶°ø±â ¸ô´ç ¼öºÐÀÇ ¸ô¼ö   
Pm = Pa * (P/Pa -1) = P-Pa..................(4a)  <---¼öÁõ±âºÐ¾Ð (2)½Ä°ú °°À½.

½À°ø±âÁú·®  = ¼öºÐÁú·® + °ÇÁ¶°ø±âÁú·®    ==> W_wet air =  W_moisture + W_dry air  .........(5)
½À°ø±âÁú·®/°ÇÁ¶°ø±âÁú·® = (¼öºÐÁú·®)/(°ÇÁ¶°ø±âÁú·®) + 1  ==>  W_wet air/W_dry air = W_moisture/W_dry air + 1 .....(5a)

°ÇÁ¶°ø±â Áú·®À¯·®*(1+Àý´ë½Àµµ)  = ½À°ø±â Áú·®À¯·®  ..........(6) 
==>°ÇÁ¶°ø±â Áú·®À¯·® = ½À°ø±âÁú·®À¯·®/(1+Àý´ë½Àµµ).......(6a)

Àý´ë½Àµµ=¼öºÐÁú·®/°ÇÁ¶°ø±â Áú·® = Habs =  Pm/Pa * (Mw/Ma) = (Ps*H)/(P-Ps*H) * Mw/Ma ..........(7)

°¢ º¯¼ö°£ÀÇ °ü°è½ÄÀº À§ÀÇ 1~7½ÄÀ¸·Î ¸ðµÎ ³ªÅ¸³¾ ¼ö ÀÖ½À´Ï´Ù.


±×·¯³ª.....Áú¹®¿¡¼­ ¾ð±ÞÇÑ "A"´Â ºÐ¸ð¿¡ Æ÷È­°ø±âÁß °ø±â·®À¸·Î Ç¥±â µÇ¾î ÀÖ¾î Àǹ̰¡ ºÒºÐ¸íÇÕ´Ï´Ù.

A = Pm/(P-Ps)*(Mw/Ma).......................(6)  <----Æ÷È­°ø±âÁß °ø±âÁú·®´ç ¼öºÐÁú·®
(1-A)= 1 - Pm/(P-Ps)*(Mw/Ma)  ----------(7)  <---(1-A)ÀÇ ÀǹÌ:  ????? 

°ÇÁ¶°ø±âÁú·®´ç ¼öºÐÁú·®À» ³ªÅ¸³»·Á¸é  A°ªÀÇ ºÐ¸ð¿¡ (P-Pm)ÀÌ µÇ¾î¾ß Çϱ⠶§¹®¿¡  A°ª¿¡ (P-Ps)/(P-Pm)¸¦ °öÇØÁÖ¾î¾ß ¸Â½À´Ï´Ù.

B =°ÇÁ¶°ø±â Áú·®´ç ¼öºÐÁú·® =  Pm/(P-Pm)*(Mw/Ma)  =  Pm/(P-Ps)*(Mw/Ma)  *  (P-Ps)/(P-Pm) =  A* (P-Ps)/(P-Pm) ..(8)
½À°ø±âÁú·®, C = °ÇÁ¶°ø±âÁú·® + ¼öºÐÁú·® =°ÇÁ¶°ø±âÁú·® * (1+B) .............(9) 


A2)  Antoine Eq.¿¡ ÀÇÇÑ ¹°ÀÇ Áõ±â¾Ð ¼ö½ÄÀº ¿Âµµ±¸°£º°·Î »ó¼ö°¡ ´Þ¶ó Áö´Âµ¥  ¹®Çå Ãâó¿¡ µû¶ó ±¸°£ÀÌ °ãÄ¡±âµµ ÇÕ´Ï´Ù.


P= 10^{A-B/(T+C)} ¸¦ °è»êÇÏ¸ç ´ÜÀ§´Â bar absolute °ªÀÔ´Ï´Ù.    Àý´ë¾Ð·ÂÀÓ¿¡ ÁÖÀÇÇϼ¼¿ä.

¼¼ ±¸°£¿¡ ´ëÇØ °¢°¢ ¿Âµµ 200, 20, 50µµ Áï 473.15K, 293.15K, 323.15K¿¡ ´ëÇØ °è»êÇÑ °á°ú´Â ´ÙÀ½°ú °°½À´Ï´Ù.

¡É      T (K)              log(10) P            P, bar abs   
200 473.15        1.219598651    16.58053926
20   293.15            -1.631392001    0.023367271
50   323.15    -0.908693505       0.123397538

psia ´ÜÀ§·Î Áõ±â¾ÐÀ» ³ªÅ¸³½ ¼ö½ÄÀº ÀüÇô ¾û¶×ÇÑ °ªÀ» ³ªÅ¸³À´Ï´Ù (¼ö½ÄÀÌ µé·È°Å³ª ´ÜÀ§°¡ ´Ù¸£Áö ¾Ê³ª ÃßÁ¤µÊ)
¼öÁõ±âÇ¥¸¦ ÂüÁ¶ÇÏ¿© ½º½º·Î Regression ¼ö½ÄÀ» ¸¸µé¾î ³¾ ¼öµµ ÀÖ½À´Ï´Ù.
   

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